Calculator

Details Calculator Calculator

1994-12-30

1996-06-18

Douglas, Alan P.

Printing and office machinery

Typewriter or calculator

Calculator

Patent

active

D03709337

REFERENCES:
patent: D325571 (1992-04-01), Sakaguchi et al.
patent: D327494 (1992-06-01), Takahata
patent: D349511 (1994-08-01), Sakaguchi et al.
patent: D351853 (1994-10-01), Ido
patent: 5021952 (1991-06-01), Nishimura et al.
patent: 5245536 (1993-09-01), Hsieh

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